水平承载嵌岩桩的有限元分析

In this paper, the three-dimensional finite element method is employed to analysis the carrying capacity of a single pile under lateral load. Some influence parameters of the lateral carrying capacity, such as the diameter of pile, embedding depth of the pile at the building-in end and the modulus of soils have been discussed. The results indicate that the large-diameter rock-socketed pile under lateral load is destroyed gradually, and the lateral carrying capacity could be controlled mainly by horizontal deformation at the top of pile; the diameter of pile has a large impact on the lateral carrying capacity of rock-socketed pile and increasing the stiffness of pile could improve the lateral carrying capacity but the level of improving is limited; embedding depth of the pile at the building-in end has the best value which is about 3 times of the diameter of pile; the elastic modulus of soils also affects the lateral bearing capacity, and the horizontal deformation at the top of pile reduces with the modulus of soils increases. At the same time, it is adverse to the lateral carrying capacity of rock-socketed pile when the modulus of the top layer soil is smaller than that of the follow layer. The analysis results may be helpful for practical projects in future.